I give this app 4-stars only because I don't know if it's accurate, but I will say all the other light meter apps are within the same range of each other. I stuck with this one because it has the most downloads, highest rating, and most reviews. I Iike that there's a graph and a readout, that makes the app very easy to collect data and to read. I wish you could export the data though which would be a nice touch. All in all, this app gives me confidence that my orchids are receiving proper light. If you're looking for an app that measures the light spectrum then I would recommend Aspectra Mini. Again, don't know if it's accurate, but the data collected from it is very similar to the data presented by the LED maker's website. *Using a Samsung Galaxy S7 Edge for reference
Great app. Can't comment on accuracy as I don't have a light meter. Only wanted a rough guide, perfect for what I need. Didn't want expense of buying a light meter which probably wouldn't have been used enough to justify the cost.
Didn't work at all for me. Opened up, but just said "no chart data available." Edit: Tried 3 other light meter apps and they all said I had no sensor or they couldn't access it. I do have some kind of sensor as camera senses whether flash is necessary, but maybe it isn't sensitive enough for light meter apps. Looks like the only bad thing I can say about this app is that it didn't advise me it couldn't find/connect to a light sensor on my phone (LG K7).
Worked out of the box. My office has two light switches, one is meant to be brighter than the other so I can get 3 levels of brightness. In under a minute I determined the one switch is over 400lx (still climbing), and the other is 250. I prefer less light.
Seems to work. Not 100% sure of accuracy. Tested my grow lights with it.
I like the app. I wish that it would have Save function: time, location and name for keeping history/statistic. So I can survey the light in the building, rooms, ... For those capabilities I am willing to pay for the app.